with the possible exception of high doses of alprazolam,  in general benzodiazepines are highly effective,  well tolerated and unlikely to create the propensity to increase the amounts of benzodiazepine on one's own initiative.  Some individuals have low self control or little self   esteem and use many times the therapeutic amounts out of the ability to merely use benzodiazepines to stay in a oblivion or escape the daily responsibility of everyday stress